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    Instability at the Winter Stratopause: A Mechanism for the 4-Day Wave

    Source: Journal of the Atmospheric Sciences:;1993:;Volume( 050 ):;issue: 023::page 3928
    Author:
    Manney, G. L.
    ,
    Randel, W. J.
    DOI: 10.1175/1520-0469(1993)050<3928:IATWSA>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Studies using, climatological fields in a three-dimensional stability model show unstable modes near the polar winter stratopause with periods neat 4 days. The calculated modes exhibit equatorward momentum and heat fluxes near the stratopause, similar to characteristics of observed 4-day wave events, demonstrating that both baroclinic and barotropic processes are important for this instability. The baroclinic and baratropic components are considered separately by selectively removing either horizontal or vertical shear from the background flow. Although both situations reveal instability, growth rates are very slow; realistic growth rates occur only for climatological flows including both horizontal and vertical shears. Similar unstable, fast-moving waves are found near the polar stratopause for several winter months in both hemispheres.
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      Instability at the Winter Stratopause: A Mechanism for the 4-Day Wave

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4157383
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    contributor authorManney, G. L.
    contributor authorRandel, W. J.
    date accessioned2017-06-09T14:31:57Z
    date available2017-06-09T14:31:57Z
    date copyright1993/12/01
    date issued1993
    identifier issn0022-4928
    identifier otherams-21083.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4157383
    description abstractStudies using, climatological fields in a three-dimensional stability model show unstable modes near the polar winter stratopause with periods neat 4 days. The calculated modes exhibit equatorward momentum and heat fluxes near the stratopause, similar to characteristics of observed 4-day wave events, demonstrating that both baroclinic and barotropic processes are important for this instability. The baroclinic and baratropic components are considered separately by selectively removing either horizontal or vertical shear from the background flow. Although both situations reveal instability, growth rates are very slow; realistic growth rates occur only for climatological flows including both horizontal and vertical shears. Similar unstable, fast-moving waves are found near the polar stratopause for several winter months in both hemispheres.
    publisherAmerican Meteorological Society
    titleInstability at the Winter Stratopause: A Mechanism for the 4-Day Wave
    typeJournal Paper
    journal volume50
    journal issue23
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1993)050<3928:IATWSA>2.0.CO;2
    journal fristpage3928
    journal lastpage3938
    treeJournal of the Atmospheric Sciences:;1993:;Volume( 050 ):;issue: 023
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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